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Main Title Prediction of the Solubility of Hydrophobic Compounds in Nonideal Solvent Mixtures.
Author Pinal, R. ; Lee, L. S. ; Rao., P. S. C. ;
CORP Author ROCOM, Montclair, NJ. ;Florida Univ., Gainesville. Dept. of Soil Science.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1991
Year Published 1991
Report Number EPA-R-814512; EPA/600/J-92/027;
Stock Number PB92-143999
Additional Subjects Aromatic polycyclic hydrocarbons ; Solubility ; Organic solvents ; Mixtures ; Sorption ; Gibbs free energy ; Mathematical models ; Reprints ; Hydrophobic organic chemicals ; Nonideal solvent mixtures ; Cosolvency
Library Call Number Additional Info Location Last
NTIS  PB92-143999 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 15p
Abstract The solubility of hydrophobic organic chemicals (HOCs) in partially-miscible solvent mixtures was investigated. In agreement with previous findings, it was observed that there is a limited domain in which nonideality effects are important; appreciable concentrations of partially-miscible (with water) organic solvents are required in order to observe significant effects on solubility. Deviations from the log-linear cosolvency model were attributed to solvent-solvent interactions, and hence quantified by the degree of nonideality of the solvent mixture. An expression was proposed for estimating the deviations from the log-linear model. For each solvent component, a nonideality term closely related to its partial excess free energy of mixing was added to the log-linear model. Predictions of solubility in binary and ternary solvent mixtures were in good agreement with experimental data. Deviations from the log-linear model were attributed to solvent nonideality which implies that there is no fundamental or mechanistic difference between the cosolvencies of partially- and completely- miscible solvents. The observed differences in cosolvencies are only in magnitude, which results from a combination of the degree of nonideality of the mixture (activity coefficients) and concentrations of the components. Examples of the application of the proposed expression are presented.
Supplementary Notes Pub. in Chemosphere, v22 n9-10 p939-951 1991. Prepared in cooperation with Florida Univ., Gainesville. Dept. of Soil Science. Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK.
NTIS Title Notes Journal article.
Title Annotations Reprint: Prediction of the Solubility of Hydrophobic Compounds in Nonideal Solvent Mixtures.
Category Codes 99F
NTIS Prices PC A03/MF A01
Primary Description 600/15
Document Type NT
Cataloging Source NTIS/MT
Control Number 209921673
Origin NTIS
Type CAT